The seventh day after a woman’s period is not necessarily a safe period, depending on the actual situation of the individual. If a woman’s menstrual cycle is relatively regular, ovulation usually occurs about 14 days before the next menstrual period, 4 to 5 days before and after ovulation is the fertile period, and the rest of the time is considered the safe period, during which the chances of pregnancy are relatively small. However, if a woman’s menstrual cycle is not regular, it is difficult to accurately determine the ovulation period as well as the safe period, so the seventh day after menstruation may also belong to the period of ovulation, if you do not do a good job of contraceptive measures, the chances of getting pregnant are relatively large. Usually the safe period is not absolutely safe, there may also be pregnant, so if a woman does not intend to get pregnant, no matter in the safe period or ovulation, need to do a good job of contraceptive measures, so as to avoid accidental pregnancy.